Detailed when kvm proc list is clobbered.

[unix-history] / usr / src / sys / sparc / sunos / sun_disklabel.c

/*
* Copyright (c) 1992 The Regents of the University of California.
* All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* %sccs.include.redist.c%
*
*      @(#)sun_disklabel.c     7.1 (Berkeley) %G%
*
* from: $Header: sun_disklabel.c,v 1.5 92/06/17 07:04:12 torek Exp $
*/

/*
* SunOS disk label code.
*/

#include "sys/param.h"
#include "sys/disklabel.h"
#include "sys/device.h"
#include "sys/disk.h"
#include "sys/ioctl.h"

#include "sun_disklabel.h"

/*
* Take a sector (cp) containing a SunOS disk label and set lp to a BSD
* disk label.
*/
int
sun_disklabel(cp, lp)
       register caddr_t cp;
       register struct disklabel *lp;
{
       register u_short *sp;
       register struct sun_disklabel *sl;
       register int i, v;

       sp = (u_short *)(cp + sizeof(struct sun_disklabel));
       --sp;
       v = 0;
       while (sp >= (u_short *)cp)
               v ^= *sp--;
       if (v)
               return (0);
       sl = (struct sun_disklabel *)cp;
       lp->d_magic = 0;        /* denote as pseudo */
       lp->d_ncylinders = sl->sl_ncylinders;
       lp->d_acylinders = sl->sl_acylinders;
       v = (lp->d_ntracks = sl->sl_ntracks) *
           (lp->d_nsectors = sl->sl_nsectors);
       lp->d_secpercyl = v;
       lp->d_npartitions = 8;
       for (i = 0; i < 8; i++) {
               lp->d_partitions[i].p_offset =
                   sl->sl_part[i].sdkp_cyloffset * v;
               lp->d_partitions[i].p_size = sl->sl_part[i].sdkp_nsectors;
       }
       return (1);
}

int
sun_dkioctl(dk, cmd, data, partition)
       struct dkdevice *dk;
       int cmd;
       caddr_t data;
       int partition;
{
       register struct partition *p;

       switch (cmd) {

       case DKIOCGGEOM:
#define geom ((struct sun_dkgeom *)data)
               bzero(data, sizeof(*geom));
               geom->sdkc_ncylinders = dk->dk_label.d_ncylinders;
               geom->sdkc_acylinders = dk->dk_label.d_acylinders;
               geom->sdkc_ntracks = dk->dk_label.d_ntracks;
               geom->sdkc_nsectors = dk->dk_label.d_nsectors;
               geom->sdkc_interleave = dk->dk_label.d_interleave;
               geom->sdkc_sparespercyl = dk->dk_label.d_sparespercyl;
               geom->sdkc_rpm = dk->dk_label.d_rpm;
               geom->sdkc_pcylinders =
                   dk->dk_label.d_ncylinders + dk->dk_label.d_acylinders;
#undef  geom
               break;

       case DKIOCINFO:
               /* Homey don't do DKIOCINFO */
               bzero(data, sizeof(struct sun_dkctlr));
               break;

       case DKIOCGPART:
               if (dk->dk_label.d_secpercyl == 0)
                       return (ERANGE);        /* XXX */
               p = &dk->dk_label.d_partitions[partition];
               if (p->p_offset % dk->dk_label.d_secpercyl != 0)
                       return (ERANGE);        /* XXX */
#define part ((struct sun_dkpart *)data)
               part->sdkp_cyloffset = p->p_offset / dk->dk_label.d_secpercyl;
               part->sdkp_nsectors = p->p_size;
#undef  part
               break;

       default:
               return (-1);
       }
       return (0);
}